It may be the Anvil Chorus from Il Trocadore.
BYU Men's Chorus was created in 1901.
"The Music of Chance"?
San Diego Men's Chorus was created in 1985.
London Gay Men's Chorus was created in 1991.
Chicago Gay Men's Chorus was created in 1983.
Portland Gay Men's Chorus was created in 1980.
Connecticut Gay Men's Chorus was created in 1986.
Gay Men's Chorus of San Diego was created in 1992.
Gay Men's Chorus of Los Angeles was created in 1979.
New Hampshire Gay Men's Chorus was created in 1998.
San Francisco Gay Men's Chorus was created in 1978.